refactor: rename the theme brand and every identifier from AKSRT to Jio

Full-project rename. `git grep -i aksrt` is now empty apart from the
DBMigrator 3.3.0 changelog note that documents the rename itself.

Code identifiers
- PHP namespace AKSRT\ -> Jio\ (composer PSR-4 + 378 declarations)
- global constants AKSRT_* -> JIO_* (VERSION/DIR/URI, PAY_TYPE_*, CAPTCHA_*)
- procedural functions, hooks, options, meta keys, table names,
  cookies, query vars, ajax actions and nonces: aksrt_ -> jio_
- text domain aksrt -> jio; Theme Name -> Jio
- JS globals: aksrtData/aksrtAdminData/... -> jioData/jioAdminData/...,
  window.AKSRTCaptcha & friends -> window.JioCaptcha, Aksrt* -> Jio*
- Vue components Aks*.vue -> Jio*.vue (15 files renamed + imports)
- CSS classes/data-attrs/custom properties: aksrt- -> jio-
- REST namespace aksrt/v1 -> jio/v1 (incl. payment gateway callbacks)

Storage layer
- DB tables {prefix}aksrt_* -> {prefix}jio_*; SCHEMA_VERSION 3.2.0 -> 3.3.0
  so dbDelta creates the new names on install
- widget id_base aksrt_widget_* -> jio_widget_*
- uninstall.php drop list rebuilt from the actual migrator tables
  (dropped 3 stale entries, added the 17 missing ones)

Removed
- hardcoded https://api.aksrt.com/version.json default update endpoint;
  get_endpoint() now reads the 「更新端点」 setting and do_check() no-ops
  when it is empty

Files renamed: inc/helpers/aksrt-*.php -> jio-*.php (54),
assets/admin/src/components/form/Aks*.vue -> Jio*.vue (15).
Build artifacts regenerated: assets/css/build, assets/js/runtime,
assets/admin/build.

Verified: audit-psr4-paths errors=0, audit-admin-contracts errors=0
(warnings=56, unchanged baseline), 813/813 widget-system tests,
44/44 phpunit, php -l clean across all PHP.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

src/WidgetSystem/RendererHelpers.php

@@ -1,6 +1,6 @@
 <?php
 
-namespace AKSRT\WidgetSystem;
+namespace Jio\WidgetSystem;
 
 defined('ABSPATH') || exit;
 
@@ -24,7 +24,7 @@ final class RendererHelpers {
 		if ($url === '') {
 			return '';
 		}
-		return '<img' . aksrt_get_lazy_attr($key, $url, $class, $lazy_src) . ' alt="' . esc_attr($alt) . '">';
+		return '<img' . jio_get_lazy_attr($key, $url, $class, $lazy_src) . ' alt="' . esc_attr($alt) . '">';
 	}
 
 	public static function lines(string $value): array {
@@ -33,10 +33,10 @@ final class RendererHelpers {
 	}
 
 	public static function empty_state(string $message): string {
-		if (function_exists('aksrt_get_widget_null')) {
-			return aksrt_get_widget_null($message);
+		if (function_exists('jio_get_widget_null')) {
+			return jio_get_widget_null($message);
 		}
-		return '<div class="aksrt-widget__empty" role="status">' . esc_html($message) . '</div>';
+		return '<div class="jio-widget__empty" role="status">' . esc_html($message) . '</div>';
 	}
 
 	public static function card_media(array $item, string $class = ''): string {
@@ -44,24 +44,24 @@ final class RendererHelpers {
 		$link = self::link((array) ($item['link'] ?? []));
 		$media = '';
 		if (!empty($item['image_dark'])) {
-			$media .= self::image((string) $item['image_dark'], $title, 'aksrt-media-card__image aksrt-media-card__image--dark');
+			$media .= self::image((string) $item['image_dark'], $title, 'jio-media-card__image jio-media-card__image--dark');
 		}
-		$media .= self::image((string) ($item['image'] ?? ''), $title, 'aksrt-media-card__image');
+		$media .= self::image((string) ($item['image'] ?? ''), $title, 'jio-media-card__image');
 		if (!empty($item['video'])) {
 			$video = esc_url((string) $item['video']);
-			$video_attr = aksrt_is_lazy('lazy_other')
-				? ' class="aksrt-media-card__video lazyload" src="" data-src="' . $video . '"'
-				: ' class="aksrt-media-card__video" src="' . $video . '"';
+			$video_attr = jio_is_lazy('lazy_other')
+				? ' class="jio-media-card__video lazyload" src="" data-src="' . $video . '"'
+				: ' class="jio-media-card__video" src="' . $video . '"';
 			$media .= '<video' . $video_attr . ' muted loop playsinline preload="metadata"></video>';
 		}
-		$body = '<span class="aksrt-media-card__body"><strong>' . esc_html($title) . '</strong>';
+		$body = '<span class="jio-media-card__body"><strong>' . esc_html($title) . '</strong>';
 		if (!empty($item['description'])) {
 			$body .= '<small>' . esc_html((string) $item['description']) . '</small>';
 		}
 		$body .= '</span>';
 		$tag = $link['url'] !== '' ? 'a' : 'div';
 		$attrs = $link['url'] !== '' ? ' href="' . $link['url'] . '"' . self::link_attrs($link) : '';
-		return '<' . $tag . ' class="aksrt-media-card ' . esc_attr($class) . '"' . $attrs . '><span class="aksrt-media-card__media">' . $media . '</span>' . $body . '</' . $tag . '>';
+		return '<' . $tag . ' class="jio-media-card ' . esc_attr($class) . '"' . $attrs . '><span class="jio-media-card__media">' . $media . '</span>' . $body . '</' . $tag . '>';
 	}
 
 	public static function ids(string $value): array {